Head-block-sawing machine.



No.740,727. PATENTTBD 0016,1903.

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HEAD BLOCK SAWING MAGHIN E.

APPLIUATIONIILED 001". 30;, 1902. 1m MODEL. a SHEETS-SHEET 1.

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APPLIOATIOB 311.31) 00130, 1902.

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No. 740,727. PATENTED 001*. a, 1903. G. P. WISSMAN. HEAD 51.0.01; SAWINGMACHINE.

APPLICATION FILED OCT. 30, 1902' H0 MODEL. 3 SHEETS-SHEET 3.

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WITNESSES:

' tical section of the two block-holders.

UNITED STATES li'atented October 6?, 1903.

PATENT OFFICE.

HE AD-BL OCK-SAWING MACHINE.

SPECIFICATION forming part of Letters Patent No. 740,727, dated October6, 1903. Application filed October 30, 1902. Serial No. 129.501. (Nomodel.)

To all whom, it may concern:

Be it'known that I, GEORGE F. W'ISSMAN, of Indianapolis, county ofMarion, and State of Indiana, have invented a certain new and usefull-Iead-Block-Sawing Machine; and I do hereby declare that the followingis a full, clear, and exact description thereof, reference being had tothe accompanying drawings, in which like numerals refer to like parts.

machine for the rapid and economical sawing of head-blocks and likepieces of timber in the shape of a quarter-circle. Such blocks are nowin common use for making the corners of window and door frames.-The;ma-. chine herein shown not only saws the block out of a largerpiece of timber, but also forms the edges thereof rounding andcompletely finishes the head-block.

The nature of this invention will be understood from the accompanyingdrawings and the following description and claims. I

In the drawings,- Figure 1 is a perspective of the machine. Fig. 2 is aplan View of the block-holder at the left-hand end of the machine. Fig.3 is a side elevation of the blockholder. Fig. 4 is a centrallongitudinal ver- Fig. 5 is a central vertical section ofone of the sawsand attached parts. Fig. 6 is a left end elevation of the saw shown inFig. 5. shows details of. the bit for forming the rounded edge of theblock. Fig. 8 is a boltfor connecting the two bits foreachsaw. Fig. 9 isa block of wood from which the headblocks are sawed, the head-blocks tobe sawed therefrom shown by dotted lines. Fig. 10 is a cross-sectionthrough one head-block :to show the form of its edges. Fig. 11 is asection on the line A A of Fig. 1. Fig. 12 isan end elevation of themeans for mountingand carrying the block-holders. Fig. 13 is acrosssection of the block-holder on the line B B of Fig. 2. Fig. 14 isan innerend elevation of the block-holder.

In detail 1 0 represents a frame made of tim bers placed rectangularlywith each other and secured together upon the legs 11, which lat -terare held in place by the base-blocks 12 and brace-pieces 13. A shaft 14is mounted in the bearings 15, secured to the legs 11, that The objectof this invention is to provide a is driven by a pulley 16 and belt 17.The shaft 14 has a bevel-pinion 18, that meshes with the bevel-gear 19,carried on the horizontal shaft 20, that is mounted on the stands 21,supported on the brace-pieces 13. Said shaft 20 carries a crank-wheel22, with which the connecting-rod 23 is connected and driven. Thisconstitutes the framework anddriving mechanism of the machine. On theframe I place at each end two pairs of blocks 25 and 26, somewhatseparated from each other to leave an opening between them. Upon theseblocks I mount the base 27 of the block-holder by lag-screws through theholes 28. The inner end of said block-holder is formed of two plates 30and 31 integral with the base 27 and placed at a right angle to eachother, as shown in Fig. 13. Between said plates at the lower end thereis a longitudinally-extending slot 32, through which an arm 33 extendsfor carrying the clamping-head 34, which is in the form of aquarter-circle fitting in between the two plates 30 and 31 andreciprocable longitudinally therein.

The arm 33 extends down and is secured to the rod 38,whiohhas connectedwith it the connecting-rod 23, as appears in Fig.4. In that figure it isseen that as the rod 38 moves backward and forward longitudinally itwill reciprocate the arms 33 and clampingheads 34. Av shaft 35 ismounted loosely, so ;as to be longitudinally movable in thebushing 71 ofthe arm 33 and in the bearings 36-and 37.

A clamping-arm 39 is secured to the inner end of each of the rods 35 andcooperates with the clamping-head 34 for holding the wooden block whileit is being sawed. of said clamping-arms is controlled by the springs 40on the rods 35 between the set-collars 41, and the outward movement ofthe clamping-arms and rods 35 is limited by the inner set-collar 41. Aplate 42 is secured on the ends of the plates 30 and 31 and is cut outcentrally, as is shown in Fig. 14, to permit the movement of theclamping-arm 39 and also the block-removing finger 45. This finger is arectangular piece of iron with one end extending perpendicularly fromthe plate: 30 and the other end reciprocating in the groove 46 in saidplate and secured to the clampinghead 34, so as to move with saidclamping- The tension head. There is also an opening 47 in the plate 31,to be seen in Fig. 2, through which the block can fall after it has beensawed out.

Coming now to the saw construction, I mount a shaft 50 in the bearings51 on the wooden cross-pieces 52 and braced by the plate A pulley 54 iscentrally secured to said shaft for actuating it. At each end of saidshaft 50 there is a drum 55, to which a cylindersaw 56 is secured by thebolts 57. This saw construction has no lateral movement and the outerends of the saws surround the inner ends of the block-holders, so thatthe cylinder-saws will cut the curved portion of the head-block out of apiece of timber put into the machine. The edges of the curved portion ofsaid blocks are rounded and finished by a pair of bits (30 in each sawthat are bolted in place by the bolts 57, extending through the slots61, whereby they may be adjusted longitudinally and are held apart bythe right and left hand screws at the ends to keep said bits fromexpanding. A wooden ring 63 is placed within the saw to maintain itstrue curvature, it being wedged in tight by the wedge 64. (Shown in Fig.6.)

The operation of the machine is as follows: The clamping -heads 34 movealternately toward and away from their corresponding clamping -arms 39.When said two clamps are apart, as shown, for example, in Fig. 2, theblock to be sawed, which is-rectangular, is placed on the plates 30 and31 between the clampinghead 34 and the finger 45. The further operationof the machine moves such clamping-head and the board inward until theboard is clamped between the parts 34 and 39. After the Wood is thusclamped and it is moved farther inward it comes in contact with the saw,and the block is sawed while it is thus being moved inward. After themachine reaches its limit of movement the parts are reversed and thesawed block is carried back until the clamping-head 34 reachesitsoutward limit of movement, as in Fig. 2, and then the block falls outthrough the opening 47 As the block at the left-hand end of the machineis being sawed the block at the right-hand end is dropping out and a newblock being put in place, and this process is repeated alternately ateach end, so that all that is necessary to do is to feed the machinewith blocks to be sawed and it will turn them out in finished form, bothsawing and trimming them at the same time.

\Vhat I claim as my invention, and desire to secure by Letters Patent,is

1. In a machine of the class described, the combination with aeylinder-saw, of a pair of oppositely-placed longitudinally adjustablebits mounted on the inner surface of said saw for trimming the edge ofthe material while being cut by the saw.

2. In a machine of the class described, the combination with acylinder-saw, of a pair of the saw near the edge, and a bolt connectingsaid bits to prevent them from spreading.

In a machine of the class described, a cylinder-saw, a ring within saidcylinder-saw, and a wedge for spreading said ring and hold ing the sawin a true curve.

4. A machine of the class described including a cylinder-saw, astationary block-holder extending into the saw having two side platesextending at a right angle to each other, a slid able clamping-head insaid holder, means for moving it toward the saw, and a springcontrolledclamping-arm that cooperates with the clamping-head to hold the blockwhile it is being sawed.

5. Amachine of the class described including a cylinder-saw, astationary block-holder extending into the saw having two side plates ata right angle to each other, one of said plates being provided with anopen in g through which the block after being sawed may fall, a slidableclamping-head in said holder, means cooperating with the clampingheadfor holding the block, and means for moving the clamping-head toward thesaw and withdrawing the block after it has been sawed to a positionwhere it will fall through said opening.

6. A machine of the class described including a block-holder consistingof a base-plate and two block-holding plates arranged at a right angleto each other with a longitudinal slot in their vertex, a clamping-headin said holder with an arm extending down to said slot, means foractuating said clamping-head, a clamping-arm extending down through saidslot, a rod on which said arm is mounted, and a spring on said rodtending to draw the clamping-arm toward the clamping-head.

7 A'machine of the class described including a stationary block-holderand two blockholding plates arranged at a right angle to each other, oneof said plates having a slot in it for the discharge of the block afterit has been sawed, a movable clamping-head in said holder,and a fingerconnected with said clamping-head and extending therefrom suflicientlyfar to admit the block to be sawed.

8. A machine of the class described including a pair ofoppositely-extending cylinder saws, means for rotating them, and asingle means for feeding wooden blocks to said saws alternately.

9. A machine of the class described including a cylinder-saw, ablock-holder stationary with reference to said cylinder-saw withalongitudinal slot in it and also a transverse opening for the dischargeof the block after being sawed,a movable clamping-head, and aspringcontrolled clamping arm extending up through the slot in theblock-holder opposite said clamping-head to cooperate therewith inholding the block while it is being sawed.

10. A machine of the class described includlongitudinally-adjustablebits placed within ing a cylinder-saw, a block-holder stationary withreference to said cylinder-saw with a longitudinal slot in it, a movableclamping-head in the block-holder for pushing the blocks toward the saw,a finger secured to the clamping-head and extending up in front of itsface in position to cooperate with the clampinghead in loosely holdingthe block of wood before it reaches the saw, means extending up throughthe longitudinal slot in the blockholder for actuating saidclamping-head, a clamping-arm extending up through the slot in theblock-holder opposite said clampinghead to cooperate therewith inholding the block while it is being sawed, a spring which tends to forcesaid clamping-arm toward said clamping-head, and a stop to limit themovement of the clamping-arm toward the clamping-head and hold it awayfrom the clampinghead when the latter is in position to receive theblock of wood to be sawed.

11. A machine of the class described including a pair ofoppositely-extending cylindersaws, a block-holder for each sawstationary with reference thereto with alongitudinal slot in eachblock-holder, a movable clampinghead in each blockholder for pushing theblocks toward the saw, a springcontrolled clamping-arm extending upthrough the slot in said block-holder opposite said clampinghead tocooperate therewith in. holding the block while it is being sawed,areciproeating rod, and an arm secured to each of said clamping-headsand to said rod whereby the reciprocation of the rod will actuate andalternate the block-feeding mechanisms for the saws.

In witness whereof I have hereunto affixed my signature in the presenceof the witnesses herein named GEORGE F. WISSMAN.

Witnesses:

V. H. Loo woon, NELLIE ALLEMONG.

